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Filmmaker David Bishop, who grew up on the Osage Reservation, investigates the string of murders and suspicious deaths of members of the oil-rich Osage Tribe in Oklahoma during the 1920s.

Retired members of FOG, the Field Operation Group launched in secret by President Carter, detail their covert mission to rescue 52 Americans taken hostage by Iranian forces in 1979.

The unearthing of burial grounds for enslaved people at an old ironworks leads archaeologist Whitney Battle-Baptiste on a journey into the history of industrial slavery in the United States.

Historians chronicle the untold stories of Black settlers who journeyed to the Wild West in search of freedom and opportunity, examining their roles as marshals, cowboys, soldiers and more.

The CIA Museum opens its doors and vaults to reveal the top secret stories behind agency documents, "Argo" artifacts, a Soviet helicopter used in the hunt for Osama bin Laden and more.

Experts delve into the undelivered promise of rigid airships on the American military landscape, and the tragic fate of the USS Macon and efforts to explore its remains in the Pacific Ocean.